Joe Kraus, a co-founder of Excite.com, said recently that search engine marketing was making it a great time to be an entrepreneur.

Ten years ago to reach the market, we had to do expensive distribution deals. We advertised on television and radio and print. We spent a crap-load of money. There’s an old adage in television advertising “I know half my money is wasted. Trouble is, I don’t know what half